Brake-shoe.



1. D. GALLAGHER & H. JONES.

BRAKE SHOE.

APPLICATION FILED ,MAY 4. 1915.

' Patented Nov. 2, 1915,

7 Q I 3 v I WWI 7/ 'r V k I? 77 72 I p 6 I l/VVE/VTUR (74585 19 fl. 691444 4 HAP/W @A f;

I 6 ATTORNEY JOSEPH n. GA L GHER, oreLEN Rinennew j ERsninNn HARRY Jones, or" sunrises, NEW YORK, assrsnoes TO AMERICAN BRAKE SHOE & FOUNDRY GGMPANY, or manwan, new Jessa-ma conrona'rronor ewman-sa Z all whom it may concern Be it known that we, JOSEPH resident at Glen Ridge, county of EsseX, and State of. New Jersey, and HARRY JoNEs, a

citizen of the United States, and a resident H Ling end stops9 promoteand'insure the se of Suifern, in the county of Rockland and State of New Yorlghave made and invented certain new and useful Improvements in Brake-Shoes, of which the following is a specification This invention relates are formed with hard and soft metal sections'which are separately cast, so that'the metal of eachsection may possess the exact and desired characteristics.

The object of the present invention is to provide the separately cast sections with interlcckingends whichare drawn into rigid engagement by the contraction of the sections as they cool, whereby the usual reinforcing member of expanded metal orwi're.

Other objects and advantages will appear as the description proceeds, wherein it is to be understood that changes in the precise embodiment of the invention can beniade within the scope of what-1s claimed without departing from the spiritthereof.

The preferred embodiment of our invention is disclosed in the accompanying drawings, wherein:

Figure l is a plan view of the wearing face of a brake shoe embodying the characteristic features of our invention; Fig. 2 is a plan view of the back thereof; Fig. 3 is a view in longitudinal section of the foregoing; Fig. 4 is a View in cross section taken on the line 44 of Fig. 2.

Referring specifically to the several views, the brake shoe which is therein disclosed is formed with a steel reinforcing back 6 of the usual and preferred form, and includes the integral attaching lug 7, whereby the shoe may be secured to the brake head.

Separately cast upon the ends of the rein- BRAKE-SHOE. I

Specificationof Letters'Patent.

. Application filed May 4, 1915. Seria1N0. 2 5,688.-l

D. GALLA- I ones, a citizen of the United States, and a to brake shoes, and more particularly to that class or type Which v .Patented v, 2, i915.

forcing back 6, whichiacts 'as' a common sup port, are the hard metal end sections 8, the molds in which the same are formed being of such configuration thatthe; molten metal flows up, around, and-embeds, the ends of the reinforcing back Gtherein. The resultcure anchorage of the end sections to the reinforcingiback. Thehard metal end sectlons are provided with'the dove-tailed or widening recesses 10, the side walls ofwhich converge toward the center of the shoe, and are accordingly adapted to interlock with dove-tailed projections 14:, which are formed upon the central section l2. The central section 12 which is formed of soft metal is cast between the confronting ends of the hard metal sections, and the shrinkage or contraction thereof causes a slight separation between the end wallslt of the projections andthe bottom walls l6 of the dovetailed recesses 10. A slight separation also occurs between the ,-meetingends.- ,of the hard and soft sections as at 17 so that the various sections may expand slightly in an independent manner, preventing the shoe from straightening out as itbecomes heated in service. The slight separations between the various sections also materiallyincreases the heat-radiating surface for ithesections, affording ample opportunity for the dissipation of frictional heat.

- The shrinkage or contraction of the vari ous sections results in the oblique walls 18 of the end projections being drawn into forced'a'nd wedged contact with the correspending and oblique walls 11 of the dovetalled recesses 10. In this manner, a secure anchorageis had between the various sections, and the metal of the central sections, which flows up through the openings 13 in the reinforcing back, in connection with the end stops 9, practically eliminates all danger or likelihood of a section, or portion 7 thereof, becoming detached or separated from theshoe.

What we claim is 1. A. brake shoe comprising a common y, supporting member, hard metal sections anchored/thereto and provided with recesses therein, and a soft metal section anchored to said common supporting member and provided with projections extending Within and interlocking with said recesses.

2. A brake shoe comprising a reinforcing back, separated hard and soft metal sections anchored thereto provided with interlocking ends.

3. A brake shoe comprising a reinforcing back, hard metal sections anchored thereto and provided with confronting and Widening recesses therein, and a soft metal section anchored to saidback and separated from said hard metal sections, said soft metal sections provided with projections fitting within and interlocking with said recesses.

thereto, and provided with dove-tailed recesses there1n,a soft metal central section anchored to said back and slightly separated from said end sections, and provided with dove-tailed projections fitting within and stopping short ofthe bottom walls of said recesses.

5. A brake shoe comprising a reinforcing back, hard metal end sections anchored thereto and provided with dove-tailed re cesses therein, a soft metal central section anchored to said back and slightly separated from said end sections, and provided with clove-tailed projections fitting Within and stopping short of the bottom walls of said recesses, the oblique Walls of said projections'and recesses being drawn into forced Copies of this patent may be obtained for contact by the contraction of the central section.

6. A brake shoe comprising a common supporting member, separated metal sec tions anchored thereto and provided with interlocking ends.

7. Abrake shoe comprising a reinforcing back, separated sections of metal anchored thereto and provided with interlocking ends.

8. A brake shoe comprising a reinforcing back, sections anchored thereto and provided With confronting and widening recesses therein, and a central section anchored to said back and separated from said end sections, said central sections provided with projections fitting. within, and interlocking with, said end section recesses.

Signed at New York, in the county of New York, and State of New York, this 27" day of April, 1915.

JOSEPH D. GALLAGHER.

of April, 1915.

HARRY JONES. Witnesses:

FRED B. HOAGLAND, VVALLAoE SUTHERLAND.

five cents each, by addressing the Commissioner of Patents, Washington, 1). C. 

